Bulletin of Environmental Contamination and Toxicology, 1974
Oiethylstilbestrol (DES) was used as an ingredient of cattle feed for many years because it incre... more Oiethylstilbestrol (DES) was used as an ingredient of cattle feed for many years because it increased the rate of weight gain. Unfortunately, this synthetic steroid hormone is not degraded significantly in manure and accumulates in cattle feed wastes and recently has been banned for use in feeds because it is a potential cause of cance~. Its use in implants~ however, is still allowed. Unfred (in preparation) has found OE5 in stockpiled manure in Texas feedlots at approximately one-half the concentration given in feed. Such concentrations of this powerful steroid represent possible health hazards if the manure is to be used elseuhere~ or from dust and runoff from the stockpiled waste. The lack of degradation is not surprising since a number of reports have indicated that in pharmacological concentrations (e.g. 1-20/~g/ml)
Bulletin of Environmental Contamination and Toxicology, Jun 1, 1974
Oiethylstilbestrol (DES) was used as an ingredient of cattle feed for many years because it incre... more Oiethylstilbestrol (DES) was used as an ingredient of cattle feed for many years because it increased the rate of weight gain. Unfortunately, this synthetic steroid hormone is not degraded significantly in manure and accumulates in cattle feed wastes and recently has been banned for use in feeds because it is a potential cause of cance~. Its use in implants~ however, is still allowed. Unfred (in preparation) has found OE5 in stockpiled manure in Texas feedlots at approximately one-half the concentration given in feed. Such concentrations of this powerful steroid represent possible health hazards if the manure is to be used elseuhere~ or from dust and runoff from the stockpiled waste. The lack of degradation is not surprising since a number of reports have indicated that in pharmacological concentrations (e.g. 1-20/~g/ml)
A review of research in distance education indicates that results are consistent in that there is... more A review of research in distance education indicates that results are consistent in that there is no significant difference in achievement contributable to the delivery system. This "no significant difference" perspective represents a very narrow vision of the research actually occurring in distance education. This paper attempts to examine the ."no significant difference" perspective by looking at research related to three other factors: learner interaction and control, two different approaches to multiple learning styles, and utilization of intelligent agents to facilitate interaction and collaboration. The first section looks at using computer assisted instruction (CAI) to support K-12 distance education. The second section explores a classification system for learning styles that would prove useful to help interpret the research related to learning styles in education. The third section explores learning styles in one specific setting, and the fourth and final section examines the emerging technology of intelligent agents and what impact this might have on changing the paradigm of distance education. (Contains 79 references.) (Author/AEF) Reproductions supplied by EDRS are the best that can be made from the original document.
Abstract: A review of research in distance education indicates that results are consistent in tha... more Abstract: A review of research in distance education indicates that results are consistent in that there is no significant difference in achievement contributable to the delivery system. This" no significant difference" perspective represents a very narrow vision of the research ...
Bulletin of Environmental Contamination and Toxicology, 1974
Oiethylstilbestrol (DES) was used as an ingredient of cattle feed for many years because it incre... more Oiethylstilbestrol (DES) was used as an ingredient of cattle feed for many years because it increased the rate of weight gain. Unfortunately, this synthetic steroid hormone is not degraded significantly in manure and accumulates in cattle feed wastes and recently has been banned for use in feeds because it is a potential cause of cance~. Its use in implants~ however, is still allowed. Unfred (in preparation) has found OE5 in stockpiled manure in Texas feedlots at approximately one-half the concentration given in feed. Such concentrations of this powerful steroid represent possible health hazards if the manure is to be used elseuhere~ or from dust and runoff from the stockpiled waste. The lack of degradation is not surprising since a number of reports have indicated that in pharmacological concentrations (e.g. 1-20/~g/ml)
Bulletin of Environmental Contamination and Toxicology, Jun 1, 1974
Oiethylstilbestrol (DES) was used as an ingredient of cattle feed for many years because it incre... more Oiethylstilbestrol (DES) was used as an ingredient of cattle feed for many years because it increased the rate of weight gain. Unfortunately, this synthetic steroid hormone is not degraded significantly in manure and accumulates in cattle feed wastes and recently has been banned for use in feeds because it is a potential cause of cance~. Its use in implants~ however, is still allowed. Unfred (in preparation) has found OE5 in stockpiled manure in Texas feedlots at approximately one-half the concentration given in feed. Such concentrations of this powerful steroid represent possible health hazards if the manure is to be used elseuhere~ or from dust and runoff from the stockpiled waste. The lack of degradation is not surprising since a number of reports have indicated that in pharmacological concentrations (e.g. 1-20/~g/ml)
A review of research in distance education indicates that results are consistent in that there is... more A review of research in distance education indicates that results are consistent in that there is no significant difference in achievement contributable to the delivery system. This "no significant difference" perspective represents a very narrow vision of the research actually occurring in distance education. This paper attempts to examine the ."no significant difference" perspective by looking at research related to three other factors: learner interaction and control, two different approaches to multiple learning styles, and utilization of intelligent agents to facilitate interaction and collaboration. The first section looks at using computer assisted instruction (CAI) to support K-12 distance education. The second section explores a classification system for learning styles that would prove useful to help interpret the research related to learning styles in education. The third section explores learning styles in one specific setting, and the fourth and final section examines the emerging technology of intelligent agents and what impact this might have on changing the paradigm of distance education. (Contains 79 references.) (Author/AEF) Reproductions supplied by EDRS are the best that can be made from the original document.
Abstract: A review of research in distance education indicates that results are consistent in tha... more Abstract: A review of research in distance education indicates that results are consistent in that there is no significant difference in achievement contributable to the delivery system. This" no significant difference" perspective represents a very narrow vision of the research ...
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